The Yakima OverHaul HD Adjustable Height Truck Rack System is made of aluminum with intergrated tie-down points on HD Bars, and OverHaul Towers. With the OverHaul Towers being adjustable, and the HD Bars having t- slot attachment points you have true setup flexibility to make this rack the way you need it to be. The HD Bar is engineered to add strength and make securing your load easier when you combine it with the OverHaul Towers. The Yakima OverHaul HD Adjustable Truck Rack has a high weight capacity, but can be adjusted to fit your needs. With a variety of accessories available, you can go anywhere you want to be with the Yakima OverHaul HD Adjustable Height Truck Rack. | Yakima OverHaul HD Adjustable Truck Bed Rack w/ 55-Inch Bars 8001151&YAK-8001156